Impact of fishing aggregation devices(FADs)closure measures on fishing efforts of Chinese tuna purse seine fleets
HE Shan1， WANG Xue-fang1，2，3， DAI Li-bin1， DAI Xiao-jie1，2，3， XU Liu-xiong1，2，3
1.College of Marine Sciences， Shanghai Ocean University， Shanghai 201306， China； 2.Key Laboratory of Oceanic Fisheries Exploration， Ministry of Agriculture， Shanghai Ocean University， Shanghai 201306， China； 3.Scientific Observing and Experimental Station of Oceanic Fishery Resources，Ministry of Agriculture， Shanghai 201306， China
Abstract: The fishing efforts of bigeye tuna Thunnus thynnus were compared between the Fishing Aggregation Devices(FADs)closure and the non-FADs closure by Chinese tuna purse seine data collected from 2012 to 2015 to evaluate the effects of several conservation and management measures including FADs closure on fishing efforts of bigeye tuna.The results showed that there was significant difference in average searching days between the FADs closure and the non-FADs closure in 2012 and 2013(P＜0.05)， without significant difference between the FADs closure and the non-FADs closure in 2014 and 2015(P＞0.05).The utilization of fishing days was always shown to be smaller in the FADs closure than that in the non-FADs closure from 2012-2014，except for 2015， with the gradually diminishing gap between them.There was larger average fishing sets targeting free schools in FADs closure than that in the non-FADs closure，with the maximal difference in 2015.The changes in these features of fishing efforts suggest that Chinese tuna purse seine fleets consider adjusting their fishing efforts strategies actively to adapt to the negative effects that generated from FADs closure measures.
何珊, 王学昉, 戴黎斌, 戴小杰, 许柳雄. 人工集鱼装置禁渔期措施对中国大陆金枪鱼围网船队捕捞努力量特征的影响[J]. 大连海洋大学学报, 2018, 33(1): 102-107.
HE Shan, WANG Xue-fang, DAI Li-bin, DAI Xiao-jie, XU Liu-xiong, . Impact of fishing aggregation devices(FADs)closure measures on fishing efforts of Chinese tuna purse seine fleets. Journal of Dalian Ocean University, 2018, 33(1): 102-107.
2018, Vol. 33 
